Improvement in joints for ribs of umbrellas and parasols



UNITED STATES PATENT OFFICE.

RICHARD A. STRATTON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO e. W. GARE aco.,

OF SAME PLAGE.

IMPROVEMENT IN .IOINTS FOR RlBS 0f' UMBRELLAS AND PARASOLS. n

Specification forming part of Letters Patent No. 36,260, dated August 19, 1862.

To all whom, it may concern.-

Be it known that I, RICHARD A. STRATTON, of Philadelphia, Pennsylvania, haveinvented an Improvement in Joints for the Ribs and Stretchers of Umbrellas and Parasols; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

My invention relates to the joints which connect the stretchers to the ribs of au umbrella or parasol; and my invention consists of a metal block cast to each rib and arranged. for connection to the stretcher in the manner described hereinafter, so as to form a cheap and durable joint Without-weakening the rib at the point where the greatest strength is required. 1

In order to enable others skilled in the art to make and use Inyinvention, I will now proceed to describe the manner of carrying it into effect.

-On reference to the accompanying drawings, Which form a part of this specification, Figure 1 is a perspective view of my improved joint for the ribs and stretchers of umbrellas and parasols, and Fig. 2 is a diagram illustrating the manner of making that part ofthe joint which is attached to the rib.

On reference to Fig. 1, A represents a portion of one of the steel-wire ribs of an umbrella or parasol, and B a portion of the wire stretcher joined -to the rib. f

The stretcher has the forked end with which usual metal stretchers are provided, and in this forked end fits a block, D, attached to the rib A, in the manner described hereinafter, a pin or rivet passing through the -fork and the block, and thus completing the joint.

In constructing the joints of metal ribs and stretchers it has been usual to pierce the rib for the admission ofthe pin or rivet, or elseto bend the rib in such a manner as to Vform an eye on 4the same. is necessarily weakened at the point where the greatest strength is required, and in the latter case the metal wire is necessarily deteriorated by the abrupt bends to which it is subjected in order to produce the eye. Discarding both of these plans, I cast the block D of metall directly onto the rib at the desired point, a slight indentation having been made in the In the former case the ribv Wire, so that the metal block will retain its' ing the fire, the latter maintaining the metal in a molten state, and G the chimney.

By means of a lever, H, and plunger I, a portion of the molten metal is forced into a space inclosed by two dies. K and K, this space being of the exact form of the block D, and the rod Ahaving been previously passed through the dies at the proper point, so 'that the Inoment the plunger I is operated the molten met-al will surround and adhere to the rod, and' a block,D, of the desired form will be produced. The hole in the block for the reception of the pin may be drilled or punched, or it may be, made during the process of casting by passing a pin of proper size through the dies at the desired point and subsequently withdrawing the pin.

rlhe metal used for forming the block may be ordinary type-metal, or any other metal ory alloy of sufficient durability may be used.

It Will be evident without further description that joints thus constructed for ribs and stretchers of umbrellas and parasols may be made cheaply and rapidly, and without weakening the rib A at the point where the greatest strength is required.

Without claiming, broadly, the casting of one metal onto another, I claim as my invention, and desire to secure by Letters Patent, as a new manufacture- The block D, cast to the rib A,'and arranged I for connection to the stretcher B, as and for the purpose herein set forth.

In testimony whereof I have signed my name 1 to this specification in the presence of two subscribing witnesses.

RICHARD A. STRATTON.

Witnesses:

HENRY HoWsoN, C. HoWsoN. 

